87
math.random ([m [, n]])
This function is an interface to the simple pseudo-random generator function rand provided by
ANSI C. (No guarantees can be given for its statistical properties.)
When called without arguments, returns a uniform pseudo-random real number in the range
[0,1). When called with an integer number m, math. random returns a uniform pseudo-random
integer in the range [1,m]. When called with two integer numbers m and n, math. random
returns a uniform pseudo-random integer in the range [m, n].
math.randomseed (x)
Sets x as the "seed" for the pseudo-random generator: equal seeds produce equal sequences of
numbers.
math.sin (x)
Returns the sine of x (assumed to be in radians).
math.sinh (x)
Returns the hyperbolic sine of x.
math.sqrt (x)
Returns the square root of x. (You can also use the expression x^0.5 to compute this value.)
math.tan (x)
Returns the tangent of x (assumed to be in radians).
math.tanh (x)
Returns the hyperbolic tangent of x.
6.1.28. Table manipulations
This library provides generic functions for table manipulation. It provides all its functions inside
the table. Most functions in the table library assume that the table represents an array or a list.
For these functions, when we talk about the "length" of a table we mean the result of the
length operator.
table.concat (table [, sep [, i [, j]]])
Given an array where all elements are strings or numbers, returns
sep..table[j]. The default value for sep is the empty string, the default for i is 1, and the default
for j is the length of the table. If i is greater than j, returns the empty string.
table.insert (table, [pos,] value)
Inserts element value at position pos in table, shifting up other elements to open space, if
necessary. The default value for pos is n+1, where n is the length of the table, so that a
calltable.insert(t,x) inserts x at the end of table t.
table.maxn (table)
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